#include <bits/stdc++.h>
using namespace std;
const int N = 1e5;
int a[N + 10];
int n, q, k;
// 整数二分练习1 
int main(){
    cin >> n >> q;
    for(int i = 0; i < n; i++) cin >> a[i];
    while(q--){
        cin >> k;
        int l = 0, r = n - 1;
        while(l < r){
            int mid = l + r >> 2;
            if(a[mid] >= k) r = mid;
            else l = mid + 1;
        }
        if(a[l] != k) cout << "-1 -1" << endl;
        else {
            cout << l << " "; 
            
            int l = 0, r = n - 1;
            while(l < r){
                int mid = l + r + 1 >> 1;
                if(a[mid] <= k) l = mid;
                else r = mid - 1;  
            } 

            cout << l << endl;
        }
    }
    return 0;
}